EP2794973A1 - Device for assessing a hygienic state of a water-conducting domestic appliance, and a domestic appliance of this type, and a method for assessing a hygienic state of a corresponding domestic appliance - Google Patents

Device for assessing a hygienic state of a water-conducting domestic appliance, and a domestic appliance of this type, and a method for assessing a hygienic state of a corresponding domestic appliance

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Publication number
EP2794973A1
EP2794973A1 EP12813804.7A EP12813804A EP2794973A1 EP 2794973 A1 EP2794973 A1 EP 2794973A1 EP 12813804 A EP12813804 A EP 12813804A EP 2794973 A1 EP2794973 A1 EP 2794973A1
Authority
EP
European Patent Office
Prior art keywords
domestic appliance
container
tub
water
assessing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12813804.7A
Other languages
German (de)
French (fr)
Other versions
EP2794973B1 (en
Inventor
Hans Eglmeier
Hartmut Schaub
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2794973A1 publication Critical patent/EP2794973A1/en
Application granted granted Critical
Publication of EP2794973B1 publication Critical patent/EP2794973B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/20—Parameters relating to constructional components, e.g. door sensors
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/43—Control of cleaning or disinfection of washing machine parts, e.g. of tubs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D1/00—Apparatus or devices for dispensing beverages on draught
    • B67D1/07—Cleaning beverage-dispensing apparatus
    • B67D2001/075—Sanitising or sterilising the apparatus
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/20—Washing liquid condition, e.g. turbidity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—Water supply

Definitions

  • the invention relates to a device for assessing a hygiene state of a water-conducting household appliance, in particular a domestic appliance for the care of
  • the invention also relates to a corresponding water-conducting domestic appliance as well as a method for assessing a
  • Hygiene state of a water-conducting household appliance in particular a household appliance for the care of laundry.
  • a water-bearing household appliance such as a washing machine, other washing equipment for the care and / or cleaning of laundry items or dishes of a coffee machine or other beverage preparation machine, it may come under specific installation and / or operating conditions to form a biofilm.
  • a biofilm can, for example, in the Einticianschale a
  • Washing machine can be easily recognized by a user and it can be a
  • Washing machine by a user virtually not be noticed and is only noticed when an unpleasant odor has arisen.
  • Water supply in particular a hose, and / or a container, in particular a tub, and an electrical detection device.
  • Detection device is coupled to the water supply and / or the container, in particular tub, and it is designed to perform a capacitance measurement. It is also used to assess a state of hygiene of the
  • a water supply is understood to mean one or more components which can lead or guide water or an aqueous solution.
  • the device ensures a very robust method of measurement, especially in a humid environment.
  • the detection device has two conductive electrodes which are connected to the water guide and / or the container, in particular the Lye containers are arranged. These are in particular plate-like.
  • the capacitive measurement can be carried out particularly advantageous. In addition, a corresponding mechanically stable attachment is guaranteed.
  • the electrodes are preferably arranged on an outer side of the water guide and / or the container, in particular on a rear wall of the suds container. As a result, they are accessible for maintenance and the like. Furthermore, this arrangement in a domestic appliance for the care of laundry no space between the tub and an existing drum for receiving
  • the electrodes are arranged adjacent to a bearing of a tub. This is a particularly advantageous place, as in the area of the bearing of the tub very often unwanted impurities form. The detection of this contamination is thus ensured very quickly.
  • the detection device is designed for the assessment of a property of a biofilm formed on the water guide and / or on the container, in particular on the tub, depending on a measured capacitance.
  • a characterization of a biofilm formed on the water guide and / or on the container, in particular on the suds container can be carried out as a function of the measurement frequency, depending on a spectrum of the capacitance measured by the detection device.
  • the detection device has a control unit, whereby a defined spectrum of the measurement frequency can be generated.
  • a characteristic characterizing the biofilm is the composition of the biofilm and / or the thickness of the biofilm and / or the volume density of the biofilm.
  • the device ensures that a simple, robust and inexpensive way of measuring moisture-containing coverings without direct contact with this medium can be carried out.
  • Biofilm quality allows a very fast and reliable statement about the extent to which the biofilm has already developed and to what extent more or less comprehensive cleaning measures are required.
  • the phenomenon is exploited that biofilms remain wet for a while after being wetted with water and therefore are electrically conductive.
  • This conductivity can be determined by the capacitance between the two conductive plates representing the electrodes.
  • the measured capacity allows conclusions to be drawn on the coherently wetted area and thus on the areal density of the biofilm.
  • the images of a spectrum that is, the measurement of the capacitance as a function of the measurement frequency, also allows statements about additional properties, such as the type and / or the thickness and / or the volume density of the biofilm. Low frequencies up to a few megahertz can be included in the frequency spectrum and used for the measurement.
  • the control unit which may include a microprocessor, provided that this frequency control and
  • the invention relates to a water-conducting domestic appliance, in particular a domestic appliance for the care and / or cleaning of laundry items or dishes, such as a washing machine or a dishwasher, or a
  • Beverage preparation machine with a device according to the invention or an advantageous embodiment thereof.
  • the invention relates to a method for assessing a hygiene state of a water-conducting domestic appliance, in which an electrical detection device of the domestic appliance with a water supply and / or a container, in particular a tub, the domestic appliance is electrically coupled and dependent on a capacitance measurement by the detection device of the hygiene state of the
  • Fig. 1 is a schematic perspective view of an embodiment of a domestic appliance according to the invention
  • FIG. 2 is a schematic rear view of a tub of a device according to the invention with a detection device
  • Fig. 3 is a schematic sectional view through the tub according to
  • Fig. 1 is a front view of a washing machine 1 is shown.
  • the washing machine 1 comprises a drum 2 for receiving the laundry items.
  • the drum 2 which is rotatable about an axis perpendicular to the plane of the figure, has a front loading opening 3, via which the items of laundry can be introduced into the drum 2 and taken out.
  • the washing machine 1 comprises a tub 4, which surrounds the drum 2 in regions.
  • the washing machine 1 moreover also comprises an induction bowl 5 and an operating device 6.
  • the washing machine 1 comprises a device 7, which is designed to assess a hygiene state of the tub 4.
  • the device 7 will be explained in more detail with reference to FIGS. 2 and 3.
  • Fig. 2 is a schematic view of the tub 4 shown from the rear. It is thus a rear wall 8, which is opposite to the feed opening 3 shown.
  • the Rear wall 8 is beyond the outside, which faces away from an inner volume 9 of the drum 2 and also of the tub 4.
  • the device 7 comprises in addition to the tub 4, an electrical detection device 10. This is designed for capacitance measurement. It comprises two plates as electrodes 1 1 and 12, which are formed on the rear wall 8.
  • the plate-like electrodes 1 1 and 12 are connected via signal lines 13 and 14 to a control and evaluation unit 15.
  • the capacitance measurement by the detection device 10 makes it possible to make a statement about the hygiene state of the tub 4, in particular about the presence of a biofilm 16 (FIG. 3), as it is on an inner side 17 of the tub 4, in particular in the region of a bearing 18 can train.
  • a biofilm 16 FIG. 3
  • the unit 15 includes a microprocessor 19. The capacitance measurement conclusions on the contiguous wetted surface and thus on the
  • Material composition of the biofilm 16 and / or the thickness of the biofilm 16 and / or the volume density of the biofilm 16 can be determined.
  • the described embodiment can be applied mutatis mutandis to other water-bearing household appliances.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

The invention relates to a device (7) for assessing a hygienic state of a water-conducting domestic appliance (1), in particular of a domestic appliance for the care and/or cleaning of laundry items or crockery, having a water circuit and/or a vessel (4) and an electric detection device (10) which is coupled to the water circuit and/or the vessel (4) and is configured for assessing the hygienic state of the water circuit and/or the vessel (4) depending on a capacity measurement. The invention also relates to a water-conducting domestic appliance (1) and to a method for assessing a hygienic state of a water-conducting domestic appliance (1).

Description

Vorrichtung zur Beurteilung eines Hygienezustands eines wasserführenden Hausgeräts sowie ein derartiges Hausgerät als auch ein Verfahren zum Beurteilen eines Hygienezustands eines entsprechenden Hausgeräts  Apparatus for assessing a hygiene state of a water-bearing domestic appliance and such a domestic appliance as well as a method for assessing a hygiene state of a corresponding domestic appliance
Die Erfindung betrifft eine Vorrichtung zur Beurteilung eines Hygienezustands eines wasserführenden Hausgeräts, insbesondere eines Hausgeräts zur Pflege von The invention relates to a device for assessing a hygiene state of a water-conducting household appliance, in particular a domestic appliance for the care of
Wäschestücken. Die Erfindung betrifft darüber hinaus auch ein entsprechendes wasserführendes Hausgerät als auch ein Verfahren zum Beurteilen eines Laundry. The invention also relates to a corresponding water-conducting domestic appliance as well as a method for assessing a
Hygienezustands eines wasserführenden Hausgeräts, insbesondere ein Hausgerät zur Pflege von Wäschestücken. Hygiene state of a water-conducting household appliance, in particular a household appliance for the care of laundry.
In einem wasserführenden Hausgerät, wie beispielsweise einer Waschmaschine, anderen Waschgeräten zur Pflege und/oder Reinigung von Wäschestücken oder Geschirr einer Kaffeemaschine oder einer sonstigen Getränkezubereitungsmaschine, kann es unter spezifischen Aufstell- und/oder Betriebsbedingungen zu einer Bildung eines Biofilms kommen. Ein derartiger Biofilm kann beispielsweise in der Einspülschale einer In a water-bearing household appliance, such as a washing machine, other washing equipment for the care and / or cleaning of laundry items or dishes of a coffee machine or other beverage preparation machine, it may come under specific installation and / or operating conditions to form a biofilm. Such a biofilm can, for example, in the Einspülschale a
Waschmaschine durch einen Nutzer leicht erkannt werden und es kann eine Washing machine can be easily recognized by a user and it can be a
entsprechende Reinigungsmaßnahme unverzüglich ergriffen werden. Bei Komponenten eines Hausgeräts, die schwieriger zugänglich und auch schwieriger einsehbar sind, kann eine derartige Biofilmerkennung durch eine in Augenscheinnahme nur schwierig oder gar nicht erfolgen. appropriate cleaning measures are taken immediately. For components of a household appliance, which are more difficult to access and also difficult to see, such biofilament detection can be difficult or even impossible due to visual inspection.
So kann auch eine derartige Biofilmbildung in einem Laugenbehälter einer So can such biofilm formation in a tub a
Waschmaschine durch einen Nutzer quasi nicht wahrgenommen werden und wird erst dann bemerkt, wenn eine unangenehme Geruchsbildung entstanden ist. Washing machine by a user virtually not be noticed and is only noticed when an unpleasant odor has arisen.
Je später man versucht eine derartige Biofilmbildung durch die geeigneten Maßnahmen zu reduzieren, desto geringer ist der Reinigungseffekt. The later one tries to reduce such biofilm formation by the appropriate measures, the lower the cleaning effect.
Ein regelmäßiger Einsatz geeigneter Pflegemaßnahmen, auch ohne Vorliegen einer gegenwärtigen Notwendigkeit, ermöglicht zwar in gewissem Maße die Verhinderung einer derartigen Biofilmbildung, es wird jedoch unnötig Energie verbraucht und die Umwelt durch das Reinigungsmittel, welches Chemikalien aufweist, belastet. A regular use of appropriate care measures, even without the presence of a present need, to a certain extent makes it possible to prevent one such biofilm formation, however, energy is unnecessarily consumed and the environment is polluted by the detergent having chemicals.
Es ist Aufgabe der vorliegenden Erfindung, eine Vorrichtung zur Beurteilung eines Hygienezustands eines wasserführenden Hausgeräts, ein derartiges Hausgerät als auch ein Verfahren zum Beurteilen eines Hygienezustands eines Hausgeräts zu schaffen, mit welcher bzw. mit welchem eine zuverlässige und frühzeitige Erkennung eines It is an object of the present invention to provide a device for assessing a hygiene state of a water-bearing household appliance, such a domestic appliance as well as a method for assessing a hygiene state of a domestic appliance, with which or with which a reliable and early detection of a
unerwünschten Hygienezustands von schwer oder nicht einsehbaren Komponenten eines Hausgeräts erreicht wird. Diese Aufgabe wird durch eine Vorrichtung und ein wasserführenden Hausgerät als auch ein Verfahren gemäß den unabhängigen Ansprüchen gelöst. undesirable hygiene state of hard or non-visible components of a household appliance is achieved. This object is achieved by a device and a water-conducting domestic appliance as well as a method according to the independent claims.
Eine erfindungsgemäße Vorrichtung zur Beurteilung eines Hygienezustands eines wasserführenden Hausgeräts zur Pflege von Wäschestücken umfasst eine A device according to the invention for assessing a hygiene state of a water-conducting domestic appliance for the care of laundry items comprises a
Wasserführung, insbesondere einen Schlauch, und/oder einen Behälter, insbesondere einen Laugenbehälter, und eine elektrische Detektionseinrichtung. Die Water supply, in particular a hose, and / or a container, in particular a tub, and an electrical detection device. The
Detektionseinrichtung ist mit der Wasserführung und/oder dem Behälter, insbesondere Laugenbehälter, gekoppelt und sie ist zur Durchführung einer Kapazitätsmessung ausgebildet. Sie ist darüber hinaus zur Beurteilung eines Hygienezustands der Detection device is coupled to the water supply and / or the container, in particular tub, and it is designed to perform a capacitance measurement. It is also used to assess a state of hygiene of the
Wasserführung und/oder des Behälters, insbesondere des Laugenbehälters, abhängig von der Kapazitätsmessung ausgebildet. Durch die erfindungsgemäße Vorrichtung wird nunmehr auch erreicht, dass schwer oder uneinsehbare Komponenten eines Hausgeräts im Hinblick auf ihren Hygienezustand überwacht werden können. Insbesondere ist es nunmehr gewährleistet, dass durch eine relativ einfach aufgebaute Vorrichtung eine zuverlässige und schnelle Aussage zum Hygienezustand ermöglicht wird. Unter einer Wasserführung werden im Rahmen der Erfindung als ein Bauteil oder mehrere Bauteile verstanden, welche Wasser oder eine wässrige Lösung führen oder leiten können. Water supply and / or the container, in particular of the tub, formed depending on the capacitance measurement. By means of the device according to the invention, it is now also achieved that components of a household appliance which are difficult or unobservable can be monitored with regard to their hygiene state. In particular, it is now ensured that a reliable and quick statement about the hygiene state is made possible by a relatively simple device. In the context of the invention, a water supply is understood to mean one or more components which can lead or guide water or an aqueous solution.
Darüber hinaus wird durch die Vorrichtung eine sehr robuste Vorgehensweise der Messung insbesondere in feuchter Umgebung gewährleistet. In addition, the device ensures a very robust method of measurement, especially in a humid environment.
Vorzugsweise ist vorgesehen, dass die Detektionseinrichtung zwei leitfähige Elektroden aufweist, die an der Wasserführung und/oder dem Behälter, insbesondere dem Laugenbehälter, angeordnet sind. Diese sind insbesondere plattenartig ausgebildet. Die kapazitive Messung kann dadurch besonders vorteilhaft erfolgen. Darüber hinaus ist eine entsprechende mechanisch stabile Befestigung gewährleistet. It is preferably provided that the detection device has two conductive electrodes which are connected to the water guide and / or the container, in particular the Lye containers are arranged. These are in particular plate-like. The capacitive measurement can be carried out particularly advantageous. In addition, a corresponding mechanically stable attachment is guaranteed.
Vorzugsweise sind die Elektroden an einer Außenseite der Wasserführung und/oder dem Behälter, insbesondere an einer Rückwand des Laugenbehälters, angeordnet. Dadurch sind sie zu Wartungsarbeiten und dergleichen zugänglich. Des Weiteren wird durch diese Anordnung bei einem Hausgerät zur Pflege von Wäschestücken kein Bauraum zwischen dem Laugenbehälter und einer vorhandenen Trommel zur Aufnahme von The electrodes are preferably arranged on an outer side of the water guide and / or the container, in particular on a rear wall of the suds container. As a result, they are accessible for maintenance and the like. Furthermore, this arrangement in a domestic appliance for the care of laundry no space between the tub and an existing drum for receiving
Wäschestücken, verkleinert. Laundry items, reduced.
Vorzugsweise ist bei einem Hausgerät zur Pflege von Wäschestücken vorgesehen, dass die Elektroden benachbart zu einem Lager eines Laugenbehälters angeordnet sind. Dies ist dahingehend ein besonders vorteilhafter Ort, da sich im Bereich des Lagers des Laugenbehälters sehr häufig unerwünschte Verunreinigungen ausbilden. Die Detektion dieser Verunreinigung ist somit sehr schnell gewährleistet. Preferably, in a domestic appliance for the care of laundry items is provided that the electrodes are arranged adjacent to a bearing of a tub. This is a particularly advantageous place, as in the area of the bearing of the tub very often unwanted impurities form. The detection of this contamination is thus ensured very quickly.
Vorzugsweise ist vorgesehen, dass die Detektionseinrichtung zur von einer gemessenen Kapazität abhängigen Beurteilung einer Eigenschaft eines an der Wasserführung und/oder am Behälter, insbesondere am Laugenbehälter, ausgebildeten Biofilms ausgebildet ist. It is preferably provided that the detection device is designed for the assessment of a property of a biofilm formed on the water guide and / or on the container, in particular on the tub, depending on a measured capacitance.
Insbesondere ist vorgesehen, dass abhängig von einem durch die Detektionseinrichtung gemessenen Spektrum der Kapazität in Abhängigkeit von der Messfrequenz eine Charakterisierung eines an der Wasserführung und/oder am Behälter, insbesondere an dem Laugenbehälter, gebildeten Biofilms durchführbar ist. In bevorzugter Weise ist vorgesehen, dass die Detektionseinrichtung eine Steuereinheit aufweist, wodurch ein definiertes Spektrum der Messfrequenz erzeugbar ist. In particular, it is provided that a characterization of a biofilm formed on the water guide and / or on the container, in particular on the suds container, can be carried out as a function of the measurement frequency, depending on a spectrum of the capacitance measured by the detection device. In a preferred manner, it is provided that the detection device has a control unit, whereby a defined spectrum of the measurement frequency can be generated.
Vorzugsweise ist eine den Biofilm charakterisierende Eigenschaft die Zusammensetzung des Biofilms und/oder die Dicke des Biofilms und/oder die Volumendichte des Biofilms. Preferably, a characteristic characterizing the biofilm is the composition of the biofilm and / or the thickness of the biofilm and / or the volume density of the biofilm.
Durch die Vorrichtung ist gewährleistet, dass eine einfache, robuste und preiswerte Art der Messung von feuchtigkeitshaltigen Belägen ohne direkten Kontakt mit diesem Medium durchgeführt werden kann. Die konkrete Relation zwischen Messwerten und The device ensures that a simple, robust and inexpensive way of measuring moisture-containing coverings without direct contact with this medium can be carried out. The concrete relation between measured values and
Biofilmbeschaffenheit ermöglicht eine sehr schnelle und zuverlässige Aussage darüber, inwieweit sich der Biofilm bereits ausgebildet hat und inwieweit mehr oder weniger umfängliche Reinigungsmaßnahmen erforderlich sind. Bei der vorliegenden Erfindung wird das Phänomen ausgenutzt, dass Biofilme nach Benetzung mit Wasser eine Zeitlang feucht bleiben und daher elektrisch leitfähig sind. Diese Leitfähigkeit lässt sich durch die Kapazität zwischen den beiden leitfähigen Platten, die die Elektroden darstellen, ermitteln. Die gemessene Kapazität lässt Rückschlüsse auf die zusammenhängend benetzte Fläche und damit auf die Flächendichte des Biofilms zu. Die Aufnahmen eines Spektrums, das heißt die Messung der Kapazität als Funktion der Messfrequenz, ermöglicht darüber hinaus Aussagen über zusätzliche Eigenschaften, wie die Art und/oder die Dicke und/oder die Volumendichte des Biofilms. Geringe Frequenzen bis hin zu einigen Megahertz können von dem Frequenzspektrum umfasst sein und für die Messung herangezogen werden. Vorzugsweise ist durch die Steuereinheit, welche einen Mikroprozessor umfassen kann, vorgesehen, dass diese Frequenzsteuerung und  Biofilm quality allows a very fast and reliable statement about the extent to which the biofilm has already developed and to what extent more or less comprehensive cleaning measures are required. In the present invention, the phenomenon is exploited that biofilms remain wet for a while after being wetted with water and therefore are electrically conductive. This conductivity can be determined by the capacitance between the two conductive plates representing the electrodes. The measured capacity allows conclusions to be drawn on the coherently wetted area and thus on the areal density of the biofilm. The images of a spectrum, that is, the measurement of the capacitance as a function of the measurement frequency, also allows statements about additional properties, such as the type and / or the thickness and / or the volume density of the biofilm. Low frequencies up to a few megahertz can be included in the frequency spectrum and used for the measurement. Preferably, by the control unit, which may include a microprocessor, provided that this frequency control and
Aussendung und somit die Messung über ein großes Frequenzintervall durchgeführt werden kann. Insbesondere ist dies im Mikroprozessor programmiert und dadurch der komponentenspezifische Aufwand als auch die sonstige Konzeptionierung minimiert. Des Weiteren betrifft die Erfindung ein wasserführendes Hausgerät, insbesondere ein Hausgerät zur Pflege und/oder Reinigung von Wäschestücken oder Geschirr, wie eine Waschmaschine oder eine Geschirrspülmaschine, oder eine Transmission and thus the measurement over a large frequency interval can be performed. In particular, this is programmed in the microprocessor and thereby minimizes the component-specific effort and the other design. Furthermore, the invention relates to a water-conducting domestic appliance, in particular a domestic appliance for the care and / or cleaning of laundry items or dishes, such as a washing machine or a dishwasher, or a
Getränkezubereitungsmaschine, mit einer erfindungsgemäßen Vorrichtung oder einer vorteilhaften Ausgestaltung davon.  Beverage preparation machine, with a device according to the invention or an advantageous embodiment thereof.
Darüber hinaus betrifft die Erfindung ein Verfahren zum Beurteilen eines Hygienezustands eines wasserführenden Hausgeräts, bei welchem eine elektrische Detektionseinrichtung des Hausgeräts mit einer Wasserführung und/oder einem Behälter, insbesondere einen Laugenbehälter, des Hausgeräts elektrisch gekoppelt wird und abhängig von einer Kapazitätsmessung durch die Detektionseinrichtung der Hygienezustand der Moreover, the invention relates to a method for assessing a hygiene state of a water-conducting domestic appliance, in which an electrical detection device of the domestic appliance with a water supply and / or a container, in particular a tub, the domestic appliance is electrically coupled and dependent on a capacitance measurement by the detection device of the hygiene state of the
Wasserführung und/oder des Behälters, insbesondere des Laugenbehälters, beurteilt wird. Vorteilhafte Ausgestaltungen der erfindungsgemäßen Vorrichtung sind als vorteilhafte Ausgestaltungen des erfindungsgemäßen Verfahrens anzusehen. Water supply and / or the container, in particular of the tub, is judged. Advantageous embodiments of the device according to the invention are to be regarded as advantageous embodiments of the method according to the invention.
Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand von schematischen Zeichnungen einer Waschmaschine näher erläutert. Es zeigen: An embodiment of the invention will be explained in more detail with reference to schematic drawings of a washing machine. Show it:
Fig. 1 eine schematisch perspektivische Darstellung eines Ausführungsbeispiels eines erfindungsgemäßen Hausgeräts; Fig. 1 is a schematic perspective view of an embodiment of a domestic appliance according to the invention;
Fig. 2 eine schematische Ansicht von hinten auf einen Laugenbehälter einer erfindungsgemäßen Vorrichtung mit einer Detektionseinrichtung; und FIG. 2 is a schematic rear view of a tub of a device according to the invention with a detection device; FIG. and
Fig. 3 eine schematische Schnittdarstellung durch den Laugenbehälter gemäß Fig. 3 is a schematic sectional view through the tub according to
Fig. 2.  Fig. 2.
In den Figuren werden gleiche oder funktionsgleiche Elemente mit dem gleichen In the figures, the same or functionally identical elements with the same
Bezugszeichen versehen. Provided with reference numerals.
In Fig. 1 ist eine Frontansicht einer Waschmaschine 1 gezeigt. Die Waschmaschine 1 umfasst eine Trommel 2 zur Aufnahme der Wäschestücke. Die Trommel 2, welche um eine senkrecht zur Figurenebene stehende Achse rotierbar ist, weist eine frontseitige Beschickungsöffnung 3, über welche die Wäschestücke in die Trommel 2 eingebracht und herausgenommen werden können. In Fig. 1 is a front view of a washing machine 1 is shown. The washing machine 1 comprises a drum 2 for receiving the laundry items. The drum 2, which is rotatable about an axis perpendicular to the plane of the figure, has a front loading opening 3, via which the items of laundry can be introduced into the drum 2 and taken out.
Darüber hinaus umfasst die Waschmaschine 1 einen Laugenbehälter 4, der die Trommel 2 bereichsweise umgibt. Die Waschmaschine 1 umfasst darüber hinaus auch noch eine Einspülschale 5 sowie eine Bedienvorrichtung 6. In addition, the washing machine 1 comprises a tub 4, which surrounds the drum 2 in regions. The washing machine 1 moreover also comprises an induction bowl 5 and an operating device 6.
Darüber hinaus umfasst die Waschmaschine 1 eine Vorrichtung 7, welche zur Beurteilung eines Hygienezustands des Laugenbehälters 4 ausgebildet ist. Die Vorrichtung 7 wird anhand der Fig. 2 und 3 näher erläutert. In addition, the washing machine 1 comprises a device 7, which is designed to assess a hygiene state of the tub 4. The device 7 will be explained in more detail with reference to FIGS. 2 and 3.
So ist in Fig. 2 eine schematische Ansicht des Laugenbehälters 4 von hinten gezeigt. Es ist somit eine Rückwand 8, die der Beschickungsöffnung 3 gegenüberliegt, gezeigt. Die Rückwand 8 ist darüber hinaus die Außenseite, welche einem Innenvolumen 9 der Trommel 2 und auch des Laugenbehälters 4 abgewandt ist. Die Vorrichtung 7 umfasst neben dem Laugenbehälter 4 eine elektrische Detektionseinrichtung 10. Diese ist zur Kapazitätsmessung ausgebildet. Sie umfasst zwei Platten als Elektroden 1 1 und 12, welche auf der Rückwand 8 ausgebildet sind. Die plattenartigen Elektroden 1 1 und 12 sind über Signalleitungen 13 und 14 mit einer Steuer- und Auswerteeinheit 15 verbunden. Die Kapazitätsmessung durch die Detektionseinrichtung 10 ermöglicht in sehr schneller und präziser Weise eine Aussage über den Hygienezustand des Laugenbehälters 4, insbesondere über das Vorhandensein eines Biofilms 16 (Fig. 3), wie er sich an einer Innenseite 17 des Laugenbehälters 4 insbesondere im Bereich eines Lagers 18 ausbilden kann. Thus, in Fig. 2 is a schematic view of the tub 4 shown from the rear. It is thus a rear wall 8, which is opposite to the feed opening 3 shown. The Rear wall 8 is beyond the outside, which faces away from an inner volume 9 of the drum 2 and also of the tub 4. The device 7 comprises in addition to the tub 4, an electrical detection device 10. This is designed for capacitance measurement. It comprises two plates as electrodes 1 1 and 12, which are formed on the rear wall 8. The plate-like electrodes 1 1 and 12 are connected via signal lines 13 and 14 to a control and evaluation unit 15. The capacitance measurement by the detection device 10 makes it possible to make a statement about the hygiene state of the tub 4, in particular about the presence of a biofilm 16 (FIG. 3), as it is on an inner side 17 of the tub 4, in particular in the region of a bearing 18 can train.
Die Einheit 15 umfasst einen Mikroprozessor 19. Durch die Kapazitätsmessung können Rückschlüsse auf die zusammenhängend benetzte Fläche und damit auf die The unit 15 includes a microprocessor 19. The capacitance measurement conclusions on the contiguous wetted surface and thus on the
Flächendichte des Biofilms 16 erfolgen. Insbesondere wird ein Spektrum aufgenommen, wobei dazu die Kapazität als Funktion der Messfrequenz aufgenommen wird. Es können somit auch weitere Eigenschaften, wie beispielsweise die Art und somit die Areal density of biofilm 16 done. In particular, a spectrum is recorded, for which purpose the capacitance is recorded as a function of the measurement frequency. It can thus also other properties, such as the type and thus the
Materialzusammensetzung des Biofilms 16 und/oder die Dicke des Biofilms 16 und/oder die Volumendichte des Biofilms 16 bestimmt werden. Die beschriebene Ausführungsform kann sinngemäß auch bei anderen wasserführenden Hausgeräten angewendet werden. Material composition of the biofilm 16 and / or the thickness of the biofilm 16 and / or the volume density of the biofilm 16 can be determined. The described embodiment can be applied mutatis mutandis to other water-bearing household appliances.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
Waschmaschine Washing machine
Trommel  drum
Beschickungsöffnung loading port
Laugenbehälter tub
Einspülschale  dispenser tray
Bedienvorrichtung  operating device
Vorrichtung  contraption
Rückwand  rear wall
Innenvolumen  internal volume
Detektionseinrichtung, 12 Platten Detection device, 12 plates
, 14 Signalleitungen , 14 signal lines
Steuer- und Auswerteeinheit Control and evaluation unit
Biofilm biofilm
Innenseite  inside
Lager  camp
Mikroprozessor  microprocessor

Claims

Patentansprüche claims
1 . Vorrichtung (7) zur Beurteilung eines Hygienezustands eines wasserführenden Hausgeräts (1 ), insbesondere einer Getränkezubereitungsmaschine oder eines Hausgeräts zur Pflege und/oder Reinigung von Wäschestücken oder Geschirr, mit einer Wasserführung und/oder einem Behälter (4), beispielsweise einem 1 . Device (7) for assessing a hygiene state of a water-conducting domestic appliance (1), in particular a beverage preparation machine or a domestic appliance for the care and / or cleaning of laundry items or dishes, with a water guide and / or a container (4), for example a
Laugenbehälter (4), und einer elektrischen Detektionseinrichtung (10), welche mit der Wasserführung und/oder dem Behälter, insbesondere mit dem Laugenbehälter (4), gekoppelt ist und abhängig von einer Kapazitätsmessung zur Beurteilung des Hygienezustands der Wasserführung und/oder des Behälters, insbesondere des Laugenbehälters (4), ausgebildet ist.  Lye container (4), and an electrical detection device (10) which is coupled to the water supply and / or the container, in particular with the tub (4), and depending on a capacity measurement for assessing the hygiene state of the water supply and / or the container, in particular of the tub (4) is formed.
2. Vorrichtung (7) nach Anspruch 1 , bei welcher die Detektionseinrichtung (10) zwei leitfähige Elektroden (1 1 , 12) aufweist, die an der Wasserführung und/oder dem Behälter, insbesondere dem Laugenbehälter (4), angeordnet sind. 2. Device (7) according to claim 1, wherein the detection device (10) has two conductive electrodes (1 1, 12), which are arranged on the water guide and / or the container, in particular the tub (4).
3. Vorrichtung (7) nach Anspruch 2, bei welcher die Elektroden (1 1 , 12) an einer Außenseite der Wasserführung und/oder des Behälters, insbesondere einer Rückwand (8) des Laugenbehälters (4), angeordnet sind. 3. Device (7) according to claim 2, wherein the electrodes (1 1, 12) on an outer side of the water guide and / or the container, in particular a rear wall (8) of the tub (4) are arranged.
4. Vorrichtung (7) nach Anspruch 2 oder 3, bei welcher der Behälter ein 4. Device (7) according to claim 2 or 3, wherein the container a
Laugenbehälter eines Hausgeräts zur Pflege von Wäschestücken ist und die Elektroden (1 1 , 12) benachbart zu einem Lager (18) des Laugenbehälters (4) angeordnet sind.  Lye container of a household appliance for the care of laundry items and the electrodes (1 1, 12) adjacent to a bearing (18) of the tub (4) are arranged.
5. Vorrichtung (7) nach einem der vorhergehenden Ansprüche, bei welcher die 5. Device (7) according to any one of the preceding claims, wherein the
Detektionseinrichtung (10) zur von einer gemessenen Kapazität abhängigen Beurteilung einer Eigenschaft eines an der Wasserführung und/oder am Behälter, insbesondere am Laugenbehälter (4), ausgebildeten Biofilms (16) ausgebildet ist.  Detection device (10) for the measured capacity dependent assessment of a property of a water guide and / or on the container, in particular on the tub (4), formed biofilm (16) is formed.
6. Vorrichtung (7) nach einem der vorhergehenden Ansprüche, bei welcher abhängig von einem durch die Detektionseinrichtung (10) gemessenen Spektrum der Kapazität in Abhängigkeit von der Messfrequenz eine Charakterisierung eines an der Wasserführung und/oder am Behälter, insbesondere an dem Laugenbehälter (4), gebildeten Biofilms (16) durchführbar ist. 6. Device (7) according to one of the preceding claims, wherein depending on a by the detection device (10) measured spectrum of Capacity as a function of the measurement frequency, a characterization of a at the water guide and / or on the container, in particular on the tub (4), formed biofilm (16) is feasible.
7. Vorrichtung (7) nach Anspruch 6, bei welcher die Detektionseinrichtung (10) eine Steuereinheit (19), insbesondere einen Mikroprozessor, aufweist, durch welche ein definiertes Spektrum der Messfrequenz erzeugbar ist. 7. Device (7) according to claim 6, wherein the detection device (10) has a control unit (19), in particular a microprocessor, by which a defined spectrum of the measuring frequency can be generated.
8. Vorrichtung (7) nach einem der Ansprüche 5 bis 7, bei welcher eine den Biofilm (16) charakterisierende Eigenschaft die Zusammensetzung des Biofilms (16) und/oder die Dicke des Biofilms (16) und/oder die Volumendichte des Biofilms (16) ist. 8. Device (7) according to any one of claims 5 to 7, wherein a biofilm (16) characterizing property of the composition of the biofilm (16) and / or the thickness of the biofilm (16) and / or the volume density of the biofilm (16 ).
9. Wasserführendes Hausgerät, insbesondere eine Getränkezubereitungsmaschine oder ein Hausgerät zur Pflege und/oder Reinigung von Wäschestücken oder Geschirr, wie eine Waschmaschine (1 ) oder eine Geschirrspülmaschine, mit einer Vorrichtung (7) nach einem der vorhergehenden Ansprüche. 9. Water-conducting domestic appliance, in particular a beverage preparation machine or a domestic appliance for the care and / or cleaning of laundry items or dishes, such as a washing machine (1) or a dishwasher, with a device (7) according to one of the preceding claims.
10. Verfahren zum Beurteilen eines Hygienezustands eines wasserführenden 10. A method for assessing a hygiene state of a water-bearing
Hausgeräts (1 ), insbesondere eine Getränkezubereitungsmaschine oder ein Hausgerät zur Pflege und/oder Reinigung von Wäschestücken oder Geschirr, bei welchem eine elektrische Detektionseinrichtung (10) des Hausgeräts (1 ) mit der Wasserführung und/oder einem Behälter, insbesondere einem Laugenbehälter (4), des Hausgeräts (1 ) elektrisch gekoppelt wird und abhängig von einer  Domestic appliance (1), in particular a beverage preparation machine or a household appliance for the care and / or cleaning of items of laundry or dishes, in which an electrical detection device (10) of the domestic appliance (1) with the water supply and / or a container, in particular a tub (4) , the domestic appliance (1) is electrically coupled and dependent on one
Kapazitätsmessung durch die Detektionseinrichtung (10) der Hygienezustand der Wasserführung und/oder des Behälters, insbesondere des Laugenbehälters (4), beurteilt wird.  Capacity measurement by the detection device (10) of the hygiene state of the water supply and / or the container, in particular of the tub (4) is judged.
EP12813804.7A 2011-12-21 2012-12-18 Device for evaluating the hygiene status of water-carrying domestic appliance as well as such an appliance, and a method for evaluating a hygiene status of a corresponding domestic appliance Active EP2794973B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011089364A DE102011089364A1 (en) 2011-12-21 2011-12-21 Apparatus for assessing a hygiene state of a water-bearing domestic appliance and such a domestic appliance as well as a method for assessing a hygiene state of a corresponding domestic appliance
PCT/EP2012/075872 WO2013092538A1 (en) 2011-12-21 2012-12-18 Device for assessing a hygienic state of a water-conducting domestic appliance, and a domestic appliance of this type, and a method for assessing a hygienic state of a corresponding domestic appliance

Publications (2)

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EP2794973A1 true EP2794973A1 (en) 2014-10-29
EP2794973B1 EP2794973B1 (en) 2017-03-01

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EP (1) EP2794973B1 (en)
CN (1) CN104185700B (en)
DE (1) DE102011089364A1 (en)
IN (1) IN2014KN01213A (en)
RU (1) RU2570502C1 (en)
WO (1) WO2013092538A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015204692A1 (en) * 2015-03-13 2016-09-15 BSH Hausgeräte GmbH Method for determining a degree of hygiene of a washing machine with an impedance sensor and suitable washing machine for this purpose

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3518174A (en) * 1967-08-10 1970-06-30 Inoue K Method and apparatus for purification of water containing organic contaminants
JPS607513B2 (en) * 1977-05-18 1985-02-25 株式会社日立製作所 Fully automatic washing machine
GB2102928A (en) * 1981-07-22 1983-02-09 Philips Electronic Associated Dryness sensing device for a laundry drier
DE19620512A1 (en) * 1996-05-22 1997-11-27 Miele & Cie Program-controlled washing machine
US6394111B1 (en) * 1997-06-11 2002-05-28 Ethicon, Inc. Detection of cleanliness of a medical device during a washing process
CN2589469Y (en) * 2002-07-10 2003-12-03 张霖 Full-automatic multifunctional sterile water dispenser
KR100930889B1 (en) * 2002-11-22 2009-12-10 엘지전자 주식회사 Washing machine washing method
EP1441056A1 (en) * 2003-01-22 2004-07-28 Whirlpool Corporation Washing machine
US20080092928A1 (en) * 2006-10-19 2008-04-24 Whirlpool Corporation Method and Apparatus for Treating Biofilm in an Appliance
EP2108726A3 (en) * 2009-06-29 2009-10-21 V-Zug AG Washing machine with hygiene display

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RU2570502C1 (en) 2015-12-10
IN2014KN01213A (en) 2015-10-16
EP2794973B1 (en) 2017-03-01
CN104185700A (en) 2014-12-03
CN104185700B (en) 2017-05-24
DE102011089364A1 (en) 2013-06-27
WO2013092538A1 (en) 2013-06-27

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